The build is moving forward — insulation is in, and today the cladding begins.
This sauna build update from Sauna Hus covers the next stage of our horsebox sauna conversion — insulation is now in and cladding has
begun. After a lot of careful prep, the inside of the horsebox is now fully insulated. We’ve used a combination of natural wool insulation and foil-backed board to keep the heat in and the structure breathable. Good insulation is key to an effective sauna — it allows the space to warm quickly and hold a steady temperature without overworking the stove.
Why Insulation Matters in a Sauna
Saunas rely on retained heat. Without proper insulation, you lose warmth fast — and that affects the steam (known as löyly), the comfort, and your energy use. Our aim is to keep the experience as efficient and traditional as possible: wood fired, well sealed, and deeply warming.
Sauna Build Update: Cladding Starts Today
We’re now ready to start cladding the interior walls. We’re using Estonian spruce — a sustainable Nordic timber used widely in traditional saunas. We chose spruce over cedar partly due to cost, but also because this is a Scandinavian-style sauna, and spruce is the most common sauna cladding in Scandinavia. It gives a soft, natural finish and performs well under heat.
Once installed, the spruce will be coated with a white-tinted internal sauna wax. This helps protect the wood and gently increases the light inside, making the space feel calm and inviting. It’s sourced sustainably, and selected for its ability to withstand heat and moisture without warping. Once finished, the inside will feel like a proper Nordic sauna: warm, wooden, calm.
Stay tuned for photos once the first panels are in.
You can read more about the project or book a session once we open at Sauna Hus.
It’s taken patience, but the space is starting to feel like a real sauna now.
We’ll share another sauna build update soon, once the interior cladding is complete and seating is installed.
